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+/* Copyright (C) 1995-1997,1999,2000,2003,2006,2007
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SYS_MSG_H
+#define _SYS_MSG_H
+
+#include <features.h>
+
+#define __need_size_t
+#include <stddef.h>
+
+/* Get common definition of System V style IPC. */
+#include <sys/ipc.h>
+
+/* Get system dependent definition of `struct msqid_ds' and more. */
+#include <bits/msq.h>
+
+/* Define types required by the standard. */
+#define __need_time_t
+#include <time.h>
+
+#ifndef __pid_t_defined
+typedef __pid_t pid_t;
+# define __pid_t_defined
+#endif
+
+#ifndef __ssize_t_defined
+typedef __ssize_t ssize_t;
+# define __ssize_t_defined
+#endif
+
+/* The following System V style IPC functions implement a message queue
+ system. The definition is found in XPG2. */
+
+#ifdef __USE_GNU
+/* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */
+struct msgbuf
+ {
+ long int mtype; /* type of received/sent message */
+ char mtext[1]; /* text of the message */
+ };
+#endif
+
+
+__BEGIN_DECLS
+
+/* Message queue control operation. */
+extern int msgctl (int __msqid, int __cmd, struct msqid_ds *__buf) __THROW;
+
+/* Get messages queue. */
+extern int msgget (key_t __key, int __msgflg) __THROW;
+
+/* Receive message from message queue.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern ssize_t msgrcv (int __msqid, void *__msgp, size_t __msgsz,
+ long int __msgtyp, int __msgflg);
+
+/* Send message to message queue.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int msgsnd (int __msqid, __const void *__msgp, size_t __msgsz,
+ int __msgflg);
+
+__END_DECLS
+
+#endif /* sys/msg.h */